韓国は年間17兆ベクレルのトリチウム処理水を日本海に放出し続ける自国の月城原発を棚に上げ、福島の処理水放出に強い遺憾を表明し「全ての措置取る」のだそうだ。相変らず笑わせてくれる。まず月城原発を“措置”してからお願いする。日本でも“内なる敵”が叫び出した。要注目。 https://t.co/Pdqh3LInxj
— 門田隆将 (@KadotaRyusho) April 13, 2021
Why South Korea is wrong about Fukushima tritium
No serious experts believe that South Korea is genuinely worried about the effect on the global ecosystem of water stored at the Fukushima site, which contains a quantity of the element known as tritium. This is partly because tritium is the least radioactive of all radioactive elements. James Conca, an environmental scientist and adjunct professor at Washington State University, argues that “tritium emits an incredibly weak beta particle that is easily stopped by our dead skin layer. It only goes a quarter-inch in air. Even ingestion of tritium doesn’t do anything.”
There is another aspect to this issue. Seoul’s accusation contradicts what South Korea’s nuclear industry has been doing for so long: discharging tritium-bearing water into the sea.
The inconvenient truth is that South Korea knows first-hand that tritium does not constitute a public health risk when released in water in a controlled manner. At Wolseong Nuclear Power Plant, South Korea has for years been operating CANDU reactors which produce more tritium than any other type of reactors, and has been discharging tritium-bearing water into the sea. In fact, the total amount of tritium released by the Wolseong power plant in the past two decades is much greater than the tritium in the water stocked at the Fukushima site.
Despite this, there has been very little, if any, public outcry against South Korea from its neighbors. Researchers agree that tritium discharge will not cause serious additional radiation exposure.
According to a Canadian Nuclear Safety Commission report on tritium releases, the Bruce Nuclear Generating Station in Ontario, which is equipped with the same reactor type as the Wolseong Nuclear Power Plant, releases 600 to 800 terabecquerels of tritium per year, yet the report estimates that residents near the station will receive only an additional 0.0015 millisieverts of radiation dose per year. Comparing this to the worldwide average dose of 2.4 millisieverts per year from natural background radiation, one can conclude that the effect of the tritium discharge to human health is negligible.
Why the decision to release treated Fukushima water took a decade
Experts have deemed that the water that contains tritium, a radioactive form of hydrogen, is scientifically safe. While other nuclear plants in Japan and elsewhere release the same kind of water into the sea, it took ten years to make the decision after the meltdown triggered by a magnitude 9.0 earthquake on March 11, 2011.
According to the Ministry of Economy, Trade and Industry, 860 trillion becquerels of tritium are stored in the tanks at the Fukushima plant -- equivalent to the amount of tritium released by South Korea's Wolseong Nuclear Power Plant over six to seven years. A reprocessing plant in France would release that amount in less than a year. No environmental impact has been confirmed in those countries.
更新
海外でもトリチウム放出 韓国原発は年間１３６兆 仏再処理施設は１・３京
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